This guys blog was probably the most helpful to me. http://rotordesign.com/1993cummins/category/bosch-ve-pump/page/14/
I want to try and document my experience here. I didn't get as many pictures as I would of liked but here goes nothing.
You will need a rebuild kit and here is the one for the VE pump on Dodge First Gens. Be sure to lube up all your seals and orings with oil or diesel fuel. I used STP oil treatment and it worked great.
First off you will need to remove the injection pump from the truck this is pretty straight forward and is covered very well on the interwebs.
You can get to the majority if not all of the seals without completely disassembling the pump. The first part I replaced was the power valve seals. You will need a 10mm open end wrench and I think the small end of the hard line is a 8mm.
Here it is removed from the pump.
Remove the hard line and the old orings and then just match up the old orings with the new orings.
After the powervalve the next easiest seals to get to are the KSB valve seals. There will be one of these on each side. Careful, there is a spring under the cap.
Here it is with the cap removed on the opposite side of the pump from the previous picture.
Next I did the gov shaft seal. I was perplexed on how to do this one for awhile. The link i referred to earlier the guy didn't really say how to get to the seal. I did find a thread later that explained that once you take the retaining nut and washer off you turn the shaft out just far enough to expose the oring.
This is the shaft prepped and ready to put the new oring on. I used the tape trick to cover up all exposed threads to protect the new orings from being damaged.
Next is the main shaft front seal. I made a seal puller out of an old flat screw driver, only after I stabbed myself with a ice pick. This screw driver works great it popped right out. No need for complete disassembly!
Here it is ready for the new seal.
I installed the new front mains shaft seal using a 7/8 deep well socket and a small ball peen hammer.
Here is the new seal all installed.
I changed out the throttle shaft seal. Be sure to make note of and mark where the throttle shaft is indexed in the housing. The throttle shaft pushes down and out of the top of the top cover. Its pretty straight forward. Watch a few videos on utube that document changing out the gov spring. It will give you a better idea of how the top comes off. Just know that you will have to unhook one side of the gov spring to take the top off. Don't force it off!
Throttle shaft with old oring.
With the top off the pump I took the liberty of installing a 366 gov spring while I was at it.
Now for me the hardest part was replacing the pump head seal. It wasn't really difficult I just didn't know what I was doing but once you get the head off and figure out how all the parts go together its just a matter of getting the head back on with everything else staying in its proper place and going in the correct holes. Here you can see there are 4 (If i recall correctly) torx bolts that hold the head on. Pay attention to the orientation of parts as you slowly pull the head off. There is a shaft that goes in the middle of the head and it will try to come out with it. Just reach in and push it back down into the pump as you lift the head off.
Here is what the inside of your pump should look like.
Odds are when you pulled the head off everything came out of place. The shaft is should be attached via a socket that is in the side of the shaft to a small ball on the part you see in this picture that is black and has the numbers 4180 on it. ( You can see I am very technical
)You will need to mate these back together before you put the head back on.
Here is a picture of the socket in the side of the shaft. I filled it with grease to help hold the ball in place as I put the head back on the pump
There is also a shim under the shaft and make sure it is in place. Some grease will help hold things in place as you try to put the head back on. The link to the blog I referred to is better at explaining this step then I am. Altho he does more of a complete disassembly of the pump then I do.
There are two spring that will fall out of the head when you initially remove it from the pump. Some grease will help hold them in place as you put the head back on the pump.
From here just line everything up. The springs with the pins in the middle of them will fit into the two boss on the top of the end. It took me a few trys to get it back together but just be patient and take your time.
As you put the head back on go slow and make sure the bore that the head is going down into and the green head seal is well lubed. I may edit this as I rember things. If anyone else has suggestions for changes or if you can make clarifications please feel free to chime in.
I have started to redo some of them but it's a lot of work!
, No core required, New not recon. The Stage 1 pump seems like a smart upgrade ? About $500 more than a stock-power,generic ve china pump.